Comment by jmyeet

Not an EE but I'll add an anecdote as a user.

I went through a period of using a Macbook Pro with a dock. At the time the best option seemed to be the Caldigit TS3. It's a sleek device but luckily someone else was footing the bill because:

- 3 of them failed on me. THREE;

- You really learn how bad cables are. I got in the habit of ordering 2-3 at a time because experience taught me that at least 1 of them would be bad or die;

- It exposed just how bad the USB-C situation was (and still is). Is this just a power cable? Or you want data too? How about an alt mode so you can do DisplayPort passthrough? Well good luck with all that. There's no cue that the cable can do any of that. And if a cable can, it's typically 3 feet or less in length, expensive and prone to failure.

A lot of people don't know how complex a modern USB-C or Thunderbolt cable really is. It typically has a chip in each end of the cable. So the failure mode is not just the cable, it's the two chips as well. Bend or twist the cable too much. Gone. Damage the head of the cable. Gone.

Oh and USB-C is made more complex because it can be plugged in either way. The cable and the chips at either end and the controller on either side need to be able to seamlessly handle all 4 combinations (or 2 of the cable is truly symmetric pin-wise; it might be, I'm not sure).

I hope that this tech is more stable now but I honestly doubt that it is.

I'm reminded of an old quote I heard (not sure from who) that said we went from a world where no cables fit but if they did, it worked, to a world where the cable always fit but nothing works. That's USB-C in a nutshell.

Docks have to handle a lot of bandwidth. Even passthrough requires bandwidth. It's a nice idea but it's a hard problem.